Solar PV Sizing for a Telecom Site
How many kWp and panels does the site need?
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Solar PV Sizing for a Telecom Site by TheCalcTools
How the Solar PV Sizing for a Telecom Site works
Enter the site’s average load and the share you want solar to supply.
Daily solar energy needed is load × 24 h × share.
Array size = daily energy ÷ (peak sun hours × performance ratio). Battery energy covers the night autonomy.
The formula
Worked example
Using the default values shown in the calculator:
| Site load (kW, average) | 3 |
|---|---|
| Share of load to cover with solar (%) | 60 % |
| Peak sun hours per day | 5.2 |
| System performance ratio | 0.75 |
| Panel power (W) | 550 |
| Panel area (m²) | 2.58 |
| Night battery autonomy (hours) | 4 |
| Battery usable DoD (%) | 80 % |
- Energy = 3 kW × 24 h × 60% = 43.2 kWh/day.
- Array = 11.08 kWp = 21 panels of 550 W using about 54 m².
- Night battery: 15.0 kWh usable.
Result:
| Solar energy needed (kWh/day) | 43.2 |
|---|---|
| Array size (kWp) | 11.08 |
| Panels needed | 21 |
| Roof/ground area (m²) | 54 |
| Battery for night load (kWh usable) | 15.0 |
Frequently asked questions
What is the performance ratio?
The share of ideal output that actually reaches the load after temperature, soiling, wiring and inverter losses, typically 0.70–0.82.
Where do I find peak sun hours?
Use your site’s solar-irradiance data, such as the Global Solar Atlas, for the exact location and tilt.
Sources and further reading
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This calculator gives estimates for planning only. Electrical installations must be designed, checked and carried out by qualified personnel following local codes and the equipment manufacturer's data. Never rely on this result alone for safety-critical decisions. See our disclaimer.